Abrasion-resistant shockproof large-drift-diameter throttle valve

Abstract

The utility model discloses a wear-resistant shockproof large-drift-diameter throttle valve which comprises a valve body, a throttle cavity is formed in the valve body, a drilling fluid inlet and a drilling fluid outlet which are communicated with the throttle cavity are formed in the valve body, an upper valve sleeve assembly is installed on the upper side of the valve body, and the bottom of the upper valve sleeve assembly is arranged in the throttle cavity. A plurality of limiting screws are further installed at the bottom of the upper valve sleeve assembly, a hydraulic piston assembly is installed at the top of the upper valve sleeve assembly, a lower valve sleeve assembly is installed on the lower side of the valve body, and the top of the lower valve sleeve assembly is installed in the drilling fluid outlet and located on the lower sides of the limiting screws. According to the utility model, the valve seat can be limited up and down, the falling phenomenon caused by vibration generated by washing of drilling fluid is reduced, meanwhile, the size of the lower valve sleeve and the size of the valve seat are not limited due to the separated mounting structure design of the lower valve sleeve and the valve seat, and the valve seat supporting sleeve is provided with the groove, so that the sealing performance is improved. And a subsequent dismounting tool can enter the groove to dismount the valve seat, so that the valve seat is more convenient to replace.

Description

Technical Field

[0001] This utility model belongs to the field of throttle valve technology, specifically relating to a wear-resistant and shock-resistant large-diameter throttle valve. Background Technology

[0002] A throttle valve is a valve that controls fluid flow by changing the throttle cross-section or throttle length. In various high-pressure fluid control equipment or devices in oil fields, the throttle valve is the main control component for pressure and flow. By adjusting the opening of the throttle valve, the purpose of controlling fluid pressure and flow can be achieved. However, during use, the valve core and valve seat of the throttle valve are worn by the drilling fluid, so they need to be replaced frequently. However, the existing valve seat is connected to the valve body by threads and uses spot welding to prevent loosening, which makes replacement troublesome, complicated, time-consuming and labor-intensive.

[0003] Chinese patent CN111059298A discloses a high-performance novel throttle valve for oilfield drilling and testing. It includes a valve body containing a valve core sleeve. The valve core sleeve, installed within the valve body and located on a cylindrical surface above the throttle valve inlet, has two sets of combined sealing rings. The valve core sleeve contains the combined sealing rings. A valve core is housed within the valve core sleeve, and a set of elastic energy-storing sealing rings is located within the valve core sleeve. A valve stem is located within the elastic energy-storing sealing rings. One end of the valve stem has an external thread, and a balance hole C is located inside. The valve stem is tightly connected to the valve core via the thread. It possesses excellent performance characteristics, including vibration-free operation, erosion resistance, convenient on-site maintenance, and superior linear flow characteristics and flow capacity. It is a throttle valve suitable for drilling / testing operations in ultra-high pressure wells and "three-high" wells, and conforms to the high-end well control safety equipment and testing and completion equipment requirements for exploration and development of ultra-deep wells and "three-high" wells.

[0004] However, in the aforementioned patents, the lack of a limiting and fixing mechanism for the valve seat makes it susceptible to erosion by drilling fluid, leading to wear, vibration, and loosening, and making replacement inconvenient. Therefore, there is an urgent need for a wear-resistant and vibration-resistant large-diameter throttle valve to solve the above problems. Utility Model Content

[0005] In view of the problems mentioned above in the background technology, the purpose of this utility model is to provide a wear-resistant and shock-resistant large-diameter throttling valve.

[0006] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A wear-resistant and shock-resistant large-diameter throttle valve includes a valve body with a throttle chamber inside. The valve body has a drilling fluid inlet and a drilling fluid outlet connected to the throttle chamber. An upper valve sleeve assembly is installed on the upper side of the valve body, with the bottom of the upper valve sleeve assembly located inside the throttle chamber. Several limiting screws are also installed on the bottom of the upper valve sleeve assembly. A hydraulic piston assembly is installed on the top of the upper valve sleeve assembly. A lower valve sleeve assembly is installed on the lower side of the valve body, with the top of the lower valve sleeve assembly installed inside the drilling fluid outlet and located below the limiting screws.

[0008] The lower valve sleeve assembly includes a lower valve sleeve installed inside the drilling fluid outlet. The lower valve sleeve has a T-shaped structure and two sets of sealing grooves on both the inner and outer sides. A sealing ring is installed in each sealing groove. The valve body has a limiting step groove on the lower side of the lower valve sleeve. The lower side of the lower valve sleeve contacts and limits the movement of the limiting step groove. A valve seat is installed inside the lower valve sleeve. The valve seat has guide angles on its upper and lower sides. A valve seat support flange is locked to the bottom of the valve body. A limiting protrusion is provided on the top of the valve seat support flange. The limiting protrusion is located in the limiting step groove and contacts the bottom end face of the lower valve sleeve. A static sealing groove is provided on the outer side of the limiting protrusion. A wear-resistant buffer sleeve and a valve seat support sleeve are installed sequentially from bottom to top inside the valve seat support flange. The wear-resistant buffer sleeve has removal holes on both sides. The valve seat support sleeve has several evenly arranged grooves on the top inner side and a gradient groove on the inner side.

[0009] Further specifying, the upper valve sleeve assembly includes an upper valve sleeve installed within the valve body. The lower side of the upper valve sleeve is disposed within a throttling chamber. A valve stem is slidably installed within the upper valve sleeve. A valve core is locked to the bottom of the valve stem and housed within the bottom inner side of the upper valve sleeve. A dynamic seal is also provided between the upper valve sleeve and the valve stem. A sealing cap is fitted over the dynamic seal on the valve stem. The bottom of the sealing cap is installed within the top inner side of the upper valve sleeve. A connecting sleeve is installed on the top of the upper valve sleeve. A locking cap is installed on the outer side of the connecting sleeve and locked to the top of the valve body. A drive connecting flange is installed on the top of the connecting sleeve and locked to the lower side of the hydraulic piston assembly. This structural design facilitates the installation and use of the upper valve sleeve assembly, as well as convenient disassembly, maintenance, and replacement.

[0010] Furthermore, the power output end of the hydraulic piston assembly is connected to a hydraulic piston rod, and a connecting pin is installed at the bottom of the hydraulic piston rod. The hydraulic piston rod is connected to the valve stem via the connecting pin. This structural design facilitates the movement of the valve stem.

[0011] Furthermore, several of the aforementioned limiting screws are evenly and tightly locked onto the bottom of the upper valve sleeve, with at least two of the limiting screws arranged symmetrically, and the bottom of each limiting screw pressing against the top of the valve seat. This structural design serves to limit the movement of the valve seat, preventing it from shifting.

[0012] Furthermore, the valve seat support flange is provided with an assembly step groove, the bottom of the wear-resistant buffer sleeve is installed on the assembly step groove, the valve seat support flange is provided with a support mounting groove at the top of the assembly step groove, and the bottom of the valve seat support sleeve is installed in the support mounting groove. This structural design facilitates the installation of the wear-resistant buffer sleeve and the valve seat support sleeve.

[0013] The beneficial effects of this utility model are as follows: This utility model uses a limiting screw to press onto the valve seat, and the valve seat support sleeve simultaneously supports the valve seat. At the same time, the sealing rings installed in the two sets of sealing grooves inside and outside the lower valve sleeve provide alignment, thus limiting the upper and lower movement of the valve seat and reducing the possibility of it falling off due to vibration caused by drilling fluid scouring. Furthermore, the separate installation structure design of the lower valve sleeve and valve seat allows for unrestricted dimensions of both, enabling larger valve cores and valve seats, improving performance. Additionally, the groove on the valve seat support sleeve facilitates the removal of the valve seat by inserting tools, making valve seat replacement more convenient. Attached Figure Description

[0014] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0015] Figure 1 This is a schematic cross-sectional view of the working state of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic cross-sectional view of the upper valve sleeve assembly of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic cross-sectional view of the lower valve sleeve assembly of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the valve seat shaft side structure of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the lower valve sleeve shaft side structure of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the axial structure of the valve seat support sleeve of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the wear-resistant buffer sleeve shaft side structure of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the valve seat support flange shaft side structure of a wear-resistant and shock-resistant large-diameter throttle valve according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic cross-sectional view of a wear-resistant and shock-resistant large-diameter throttle valve in its closed state according to an embodiment of the present invention.

[0024] The symbols for the main components are explained below:

[0025] 1. Valve body; 2. Throttling chamber; 3. Drilling fluid inlet; 4. Drilling fluid outlet; 5. Upper valve sleeve assembly; 6. Limiting screw; 7. Hydraulic piston assembly; 8. Lower valve sleeve; 9. Sealing groove; 10. Sealing ring; 11. Limiting step groove; 12. Valve seat; 13. Guide angle; 14. Valve seat support flange; 15. Limiting protrusion; 16. Static sealing groove; 17. Wear-resistant buffer sleeve; 18. Valve seat support sleeve; 19. Take-out hole; 20. Groove; 21. Gradient groove; 22. Upper valve sleeve; 23. Valve stem; 24. Valve core; 25. Dynamic seal; 26. Sealing gland; 27. Connecting sleeve; 28. Locking gland; 29. ​​Drive connecting flange; 30. Hydraulic piston rod; 31. Connecting pin; 32. Assembly step groove; 33. Support mounting groove; 34. Detailed Implementation

[0026] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1, as Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, a wear-resistant and shock-resistant large-diameter throttle valve has a throttle chamber 2 inside the valve body 1. The valve body 1 has a drilling fluid inlet 3 and a drilling fluid outlet 4 connected to the throttle chamber 2. An upper valve sleeve assembly 5 is installed on the upper side of the valve body 1. The bottom of the upper valve sleeve assembly 5 is located in the throttle chamber 2. Several limit screws 6 are also installed at the bottom of the upper valve sleeve assembly 5. A hydraulic piston assembly 7 is installed on the top of the upper valve sleeve assembly 5. A lower valve sleeve assembly 8 is installed on the lower side of the valve body 1. The top of the lower valve sleeve assembly 8 is installed in the drilling fluid outlet 4 and is located below the limit screws 6.

[0028] The lower valve sleeve assembly 8 includes a lower valve sleeve 9 installed inside the drilling fluid outlet 4. The lower valve sleeve 9 has a T-shaped structure and two sets of sealing grooves 10 on both the inner and outer sides. A sealing ring 11 is installed in the sealing groove 10. The valve body 1 has a limiting step groove 12 on the lower side of the lower valve sleeve 9. The lower side of the lower valve sleeve 9 contacts and limits the movement of the limiting step groove 12. A valve seat 13 is installed inside the lower valve sleeve 9. The upper and lower sides of the valve seat 13 have guide angles 14. A valve seat support flange 15 is locked to the bottom of the valve body 1. The top of the support flange 15 is provided with a limiting protrusion 16, which is located in the limiting step groove 12 and contacts the bottom end face of the lower valve sleeve 9. The outer side of the limiting protrusion 16 is provided with a static sealing groove 17. The valve seat support flange 15 is provided with a wear-resistant buffer sleeve 18 and a valve seat support sleeve 19 installed sequentially from bottom to top. The wear-resistant buffer sleeve 18 is provided with a removal hole 20 on both sides. The top of the inner side of the valve seat support sleeve 19 is provided with several evenly arranged grooves 21, and the inner side of the valve seat support sleeve 19 is provided with a gradient groove 22.

[0029] In this embodiment, during use, the upper valve sleeve assembly 5 is moved and adjusted by the hydraulic piston assembly 7 to control the opening or closing of the throttle valve. When open, drilling fluid flows in from the drilling fluid inlet 3, passes through the throttle chamber 2, and is discharged through the lower valve sleeve assembly 8 installed in the drilling fluid outlet 4. When the valve core 25 and valve seat 13 in the upper valve sleeve assembly 5 are worn after being flushed by mud for a long time and need to be removed and maintained, the upper valve sleeve assembly 5 and the hydraulic piston assembly 7 are first removed from the valve body 1 by an external auxiliary disassembly tool. Then, the external disassembly tool is inserted into the valve body 1, and after passing through the valve seat 13, the disassembly head is extended into the groove 21 in the valve seat support sleeve 19. Then, the external disassembly tool is pulled outward so that the external disassembly tool can drive the valve seat 13 out of the lower valve sleeve 9. Finally, the worn valve seat 13 and valve core 25 can be replaced and maintained.

[0030] During use, the throttle valve is pressed onto the valve seat 13 by several limit screws 6. The valve seat support sleeve 19 supports the valve seat 13 at the same time. In addition, the sealing rings 11 installed in the two sets of sealing grooves 10 inside and outside the lower valve sleeve 9 are used to straighten the valve seat 13, so that the valve seat 13 is limited in the upper and lower positions, reducing the vibration caused by drilling fluid scouring.

[0031] Meanwhile, the height of the limit screw 6 can be adjusted by thread, which facilitates the installation of the clamping valve seat 13. Furthermore, the bottom of the upper valve sleeve assembly 5 does not have the limit screw 6 installed at the corresponding input end of the drilling fluid inlet 3, reducing the frequency of replacement of the limit screw 6.

[0032] The valve seat 13 is made of integral hard alloy, which has a simple structure, is easy to process, and is easy to replace on site. In addition, the valve seat 13 is provided with a guide angle 14 to facilitate the insertion of the valve core 25.

[0033] The valve seat support sleeve 19 has a hard alloy wear-resistant coating on its inner wall, and its internal cylindrical surface has a gradient groove 22 from small to large to reduce the drilling fluid flow rate. At the same time, the lower end of the valve seat support sleeve 19 is fixed and limited by the valve seat support flange 15. The wear-resistant buffer sleeve 18 is made of wear-resistant non-metallic material to reduce buffer corrosion and enhance the service life of the valve seat support flange 15. The wear-resistant buffer sleeve 18 is provided with a removal hole 20 for easy removal with special tools.

[0034] The limiting protrusion 16 of the valve seat support flange 15 is adapted to and pressed against the lower end face of the lower valve sleeve 9, thereby improving the fixation of the lower valve sleeve 9.

[0035] Among them, the upper valve sleeve assembly 5, valve core 25 and valve seat 13 are most susceptible to erosion and wear by drilling fluid at the inlet end near the drilling fluid inlet 3. However, the upper valve sleeve assembly 5, valve core 25 and valve seat 13 of this design can be installed in any position. The rotation angle of the upper valve sleeve assembly 5, valve core 25 and valve seat 13 and the reversing direction of the valve core 25 can effectively extend the service life.

[0036] Furthermore, the separate installation structure design of the lower valve sleeve 9 and the valve seat 13 allows for unrestricted dimensions of the lower valve sleeve 9 and the valve seat 13, thereby enabling larger dimensions of the valve core 25 and the valve seat 13 and improving performance.

[0037] Example 2, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: the upper valve sleeve assembly 5 includes an upper valve sleeve 23 installed inside the valve body 1. The lower side of the upper valve sleeve 23 is disposed in the throttling chamber 2. A valve stem 24 is slidably installed inside the upper valve sleeve 23. A valve core 25 is locked to the bottom of the valve stem 24. The valve core 25 is housed inside the bottom of the upper valve sleeve 23. A dynamic seal 26 is also provided between the upper valve sleeve 23 and the valve stem 24. A sealing cover 27 is fitted on the upper side of the dynamic seal 26. The bottom of the sealing cover 27 is installed inside the top of the upper valve sleeve 23. A connecting sleeve 28 is installed on the top of the upper valve sleeve 23. A locking cover 29 is installed on the outer side of the connecting sleeve 28. The locking cover 29 is locked to the top of the valve body 1. A drive connecting flange 30 is installed on the top of the connecting sleeve 28. The drive connecting flange 30 is locked to the lower side of the hydraulic piston assembly 7.

[0038] In this embodiment, during disassembly and maintenance, the hydraulic piston assembly 7 first moves the valve stem 24 upward to the uppermost position, so that the valve core 25 is completely inside the upper valve sleeve 23. Then, the locking cover 29 is loosened, and the locking cover 29 is rotated to move outward along the threads on the valve body 1, thus pushing the external auxiliary disassembly device. The external auxiliary disassembly device drives the drive connecting flange 30, which in turn drives the connecting sleeve 28. The connecting sleeve 28 then moves the upper valve sleeve 23 and the internal valve core assembly outward as a whole, allowing them to quickly detach from the valve body 1 for maintenance and replacement.

[0039] Example 3, as Figure 1 As shown, this embodiment adds the following structure to the embodiment 1: the power output end of the hydraulic piston assembly 7 is connected to a hydraulic piston rod 31, and a connecting pin 32 is installed at the bottom of the hydraulic piston rod 31. The hydraulic piston rod 31 is connected to the valve rod 24 through the connecting pin 32.

[0040] In this embodiment, during use, the hydraulic piston assembly 7 is controlled to drive the hydraulic piston rod 31, and the hydraulic piston rod 31 drives the valve rod 24 to move through the connecting pin 32.

[0041] Example 4, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure to the embodiment 1: several limiting screws 6 are evenly locked and installed at the bottom of the upper valve sleeve 23, and at least two limiting screws 6 are symmetrically arranged, with the bottom of the limiting screws 6 pressing against the top of the valve seat 13.

[0042] In this embodiment, during use, the throttle valve is pressed onto the valve seat 13 by several limiting screws 6, and the valve seat support sleeve 19 simultaneously supports the valve seat 13, so that the valve seat 13 is subject to upper and lower limits, reducing the vibration caused by drilling fluid scouring.

[0043] Meanwhile, the height of the limit screw 6 can be adjusted by thread, which facilitates the installation of the clamping valve seat 13. Furthermore, the bottom of the upper valve sleeve assembly 5 does not have the limit screw 6 installed at the corresponding input end of the drilling fluid inlet 3, reducing the frequency of replacement of the limit screw 6.

[0044] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the valve seat support flange 15 is provided with an assembly step groove 33, the bottom of the wear-resistant buffer sleeve 18 is installed on the assembly step groove 33, the valve seat support flange 15 is provided with a support mounting groove 34 at the top of the assembly step groove 33, and the bottom of the valve seat support sleeve 19 is installed in the support mounting groove 34.

[0045] In this embodiment, the valve seat support flange 15 is provided with an assembly step groove 33 and a support mounting groove 34, which enables the wear-resistant buffer sleeve 18 and the valve seat support sleeve 19 to be limited and fixed, so that they can be installed stably.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A wear-resistant and shock-resistant large-diameter throttling valve, characterized in that: The system includes a valve body (1), which has a throttling chamber (2) inside. The valve body (1) has a drilling fluid inlet (3) and a drilling fluid outlet (4) connected to the throttling chamber (2). An upper valve sleeve assembly (5) is installed on the upper side of the valve body (1). The bottom of the upper valve sleeve assembly (5) is located in the throttling chamber (2). Several limiting screws (6) are also installed on the bottom of the upper valve sleeve assembly (5). A hydraulic piston assembly (7) is installed on the top of the upper valve sleeve assembly (5). A lower valve sleeve assembly (8) is installed on the lower side of the valve body (1). The top of the lower valve sleeve assembly (8) is installed in the drilling fluid outlet (4) and is located below the limiting screws (6). The lower valve sleeve assembly (8) includes a lower valve sleeve (9) installed inside the drilling fluid outlet (4). The lower valve sleeve (9) is T-shaped. Two sets of sealing grooves (10) are provided on both the inner and outer sides of the lower valve sleeve (9). A sealing ring (11) is installed in the sealing groove (10). The valve body (1) has a limiting step groove (12) on the lower side of the lower valve sleeve (9). The lower side of the lower valve sleeve (9) contacts and limits the movement of the limiting step groove (12). A valve seat (13) is installed inside the lower valve sleeve (9). Guide angles (14) are provided on the upper and lower sides of the valve seat (13). A valve seat support flange (14) is locked at the bottom of the valve body (1). 5) The top of the valve seat support flange (15) is provided with a limiting protrusion (16). The limiting protrusion (16) is located in the limiting step groove (12) and contacts the bottom end face of the lower valve sleeve (9). The outer side of the limiting protrusion (16) is provided with a static sealing groove (17). The valve seat support flange (15) is installed with a wear-resistant buffer sleeve (18) and a valve seat support sleeve (19) from bottom to top. The wear-resistant buffer sleeve (18) is provided with a removal hole (20) on both sides. The valve seat support sleeve (19) is provided with a number of evenly arranged grooves (21) on the top of the inner side. The valve seat support sleeve (19) is provided with a gradient groove (22) on the inner side.

2. The wear-resistant and shock-resistant large-diameter throttling valve according to claim 1, characterized in that: The upper valve sleeve assembly (5) includes an upper valve sleeve (23) installed inside the valve body (1). The lower side of the upper valve sleeve (23) is disposed in the throttling chamber (2). A valve stem (24) is slidably installed inside the upper valve sleeve (23). A valve core (25) is locked at the bottom of the valve stem (24). The valve core (25) is housed inside the bottom of the upper valve sleeve (23). A dynamic seal (26) is also provided between the upper valve sleeve (23) and the valve stem (24). The valve stem (24) is located on the upper side of the dynamic seal (26). The side sleeve is provided with a sealing cover (27), the bottom of which is installed on the top inner side of the upper valve sleeve (23). The top of the upper valve sleeve (23) is provided with a connecting sleeve (28), and the outside of the connecting sleeve (28) is provided with a locking cover (29). The locking cover (29) is locked and installed on the top of the valve body (1). The top of the connecting sleeve (28) is provided with a drive connecting flange (30), and the drive connecting flange (30) is locked and installed on the lower side of the hydraulic piston assembly (7).

3. The wear-resistant and shock-resistant large-diameter throttling valve according to claim 2, characterized in that: The power output end of the hydraulic piston assembly (7) is connected to a hydraulic piston rod (31), and a connecting pin (32) is installed at the bottom of the hydraulic piston rod (31). The hydraulic piston rod (31) is connected to the valve rod (24) through the connecting pin (32).

4. The wear-resistant and shock-resistant large-diameter throttling valve according to claim 3, characterized in that: Several limiting screws (6) are evenly locked and installed at the bottom of the upper valve sleeve (23), and at least two of the limiting screws (6) are symmetrically arranged, with the bottom of the limiting screws (6) pressing against the top of the valve seat (13).

5. The wear-resistant and shock-resistant large-diameter throttling valve according to claim 4, characterized in that: The valve seat support flange (15) is provided with an assembly step groove (33), the bottom of the wear-resistant buffer sleeve (18) is installed on the assembly step groove (33), the valve seat support flange (15) is provided with a support mounting groove (34) at the top of the assembly step groove (33), and the bottom of the valve seat support sleeve (19) is installed in the support mounting groove (34).

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